He is the Strategic Commander of the Northern Theater.

The novel series centers on a young girl who fights on the frontlines in war. She has blonde hair, blue eyes, and nearly transparent white skin, and she flies through the air and mercilessly strikes down her opponents. Her name is Tanya Degurechaff, and she speaks with a young girl's lisp and commands the army. Tanya used to be one of Japan's elite office workers, but because of a wrathful god, was reborn as a little girl. Tanya prioritizes optimization and career advancement above all, and she will become the most dangerous entity among the Imperial Army's sorcerers. 
 
(Source: Anime News Network)

__Non-Anime Roles:__ 
- Roadhog/Mako Rutledge (Overwatch)

[Synchronkartei](https://www.synchronkartei.de/sprecher/1232/2)

What would an ultra-rational Japanese salaryman do if he was reborn as a girl in a world where magic was real? Obviously, become the Empire's most feared magic soldier, while climbing the army career ladder at the ripe old age of nine. The only things standing in Tanya Degurechaff's way are a world war and maybe a supernatural being or two. But Tanya isn't about to let artillery shells or deadly spells stop her when a cushy desk job is calling! 
(Source: Yen Press)

High above the blood- and mud-soaked trenches, a young girl pits herself against army mages in high stakes aerial duels with bullets, spells, and bayonets. Her name is Tanya Degurechaff and she is the Devil of the Rhine, one of the greatest soldiers the Empire has ever seen! But inside her mind lives a ruthless, calculating ex-salaryman who enjoyed a peaceful life in Japan until he woke up in a war-torn world. Reborn as a destitute orphaned girl with nothing to her name but memories of a previous life, Tanya will do whatever it takes to survive, even if she can find it only behind the barrel of a gun! 
(Source: Yen Press)

Heinrich Schreise